Sixty-four percent of respondents said they had "no confidence" in Trump to "do the right thing."
Trump spent his two days in London lashing out at allies and creating new rifts, but host Boris Johnson avoided the worst of the flak by limiting his interaction with the president.
"These are people who run countries...these are people who are talking about serious things," Tom Nicols said in an interview with MSNBC's Joe Scarborough. "And the president is always out of his depth in those environments."
Trump cancelled a press conference and left the meeting earlier amid a spat with Justine Trudeau, but Jens Stoltenberg said unity within the alliance was "iron-clad."
Trump told reporters he had done enough press conferences and that he would "probably" leave the London meeting early.
Queen Elizabeth II's only daughter was spotted with Justin Trudeau, Emmanuel Macron and Boris Johnson at a Buckingham Palace reception Tuesday.
The West is facing security threats unlike any since the end of the Cold War, but a dearth of leadership continues to plague the alliance.
Trump's National Security Adviser Robert O'Brien said Germany and other NATO members "not paying their fair share" of defense spending is breaking up the alliance.
Macron warned this week that the NATO alliance was experiencing "brain death" as a result of erratic U.S. foreign policy.
France's leadership has vowed to start cracking down on immigration.
The French president warned that America's withdrawal will not derail the initiative, and said he deplores such a move.
"The fight against Daesh [ISIS] is not over and continues alongside the [Kurdish-led] Syrian Democratic Forces," Prime Minister Edouard Philippe said.
Renzo Gracie also attacked Macron's wife, Brigitte, by saying, "the fact that he is sleeping with the dragon does not make him a fire expert."
The president may already be tiring of a maximum pressure policy that has resulted in much less than its supporters predicted.
"The US has spent over $100 million on Trump's golf trips," journalist Jordan Uhl tweeted.
The tenor of U.S. trade negotiations with China has fluctuated, with prior positive overtures failing to lead to any compromise.
"They're in their own separate reality," Tammy Bruce alleged.
"The last three days have been an unmitigated disaster for the president," Scaramucci said in an interview about Trump at the G-7 Summit.
"Larry, those words came out of Boris Johnson's mouth," CNN anchor Brianna Kielar pushed back. "How do you argue with that?"
The President told reporters he had second thoughts about imposing tariffs on China; as always, the White House swooped in to interpret the remarks.
French President Emmanuel Macron welcomed Trump to Biarritz on Saturday for a tête-à-tête lunch before the full contingent of international leaders kicked off the working weekend.
Although it was released at a time of "a larger narrative in the U.S. about Ivanka's diplomatic role," it was never our intention to feed into that narrative," an official from the French presidential palace said.
The pair planted the tree on the south lawn of the White House in 2018; it disappeared just days later.
President Donald Trump appeared bored when Macron talked about multilateralism.
President Donald Trump and first lady Melania Trump will join French President Emmanuel Macron at the Normandy American Cemetery to commemorate the 75th anniversary of D-Day.
Macron's party faces a battle with far-right leader Marine Le Pen in European Parliament elections on Sunday.
"I really believe that it is our duty to turn this catastrophe into a coming together [experience]," the French president said.